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Abstract: A high noise level is one of the prominent shortcomings of an axial piston pump which is widely used in industrial and mobile applications. In this paper, a simulation model of an axial piston pump is developed based on a single piston chamber model, for capturing the dynamic characteristics of the discharge flow rate. The compressibility of fluid and main leakages across different friction pairs are considered. The simulation model is validated by a comparison of discharge flow ripple with the measured results using the secondary source method. The main cause of flow ripple is identified by a comparison of the frequency spectrums of actual and kinematic flow ripples. Flow rates with different index angles are analyzed in time and frequency domains. The findings show that an index angle of 20� is the most effective in reducing the flow ripple of a tandem axial piston pump, because the frequency contents at odd harmonics can be cancelled out. A sensitivity analysis is conducted at different pressure levels, speeds, and displacement angles, which reveals that with an index angle of 20�, the sensitivity of flow ripple can be reduced by almost 50% over a wide variety of working conditions.

The authors derived a simulation model of an axial piston pump to express its flow rate ripple, taking the fluid compressibility and main leakages across different friction pairs into consideration. Based on the results using the simulation model they claimed that the best index angle is 20° for a tandem axial piston pump utilizing nine pistons within one rotating group.

转位角对串联式轴向柱塞泵流量脉动的影响

[1]Edge, K.A., Darling, J., 1989. The pumping dynamics of swash plate piston pumps. Journal of Dynamic Systems, Measurement, and Control, 111(2):307-312.

[2]Edge, K.A., Johnston, D.N., 1990a. The ‘secondary source’ method for the measurement of pump pressure ripple characteristics. Part 1: description of method. Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy, 204(11):33-40.

[3]Edge, K.A., Johnston, D.N., 1990b. The ‘secondary source’ method for the measurement of pump pressure ripple characteristics. Part 2: experimental results. Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy, 204(11):41-46.

[4]Ericson, L., 2009. Flow Pulsations in Fluid Power Machines– a Measurement and Simulation Study. Licentiate Thesis, Linköping University, Linköping, Sweden.

[5]Ericson, L., Ölvander, J., Palmberg, J.O., 2007. Flow pulsation reduction for variable displacement motors using cross-angle. Bath Workshop on Power Transmission and Motion Control, Bath, UK, p.103-116.

[6]Ericson, L., Ölvander, J., Palmberg, J.O., 2008. On optimal design of hydrostatic machines. Proceedings of the 6th International Fluid Power Conference, Dresden, Germany, p.273-286.

[7]Ericson, L., Johansson, A., Palmberg, J.O., 2009. Noise reduction by means of non-uniform placement of pistons in a fluid power machine. ASME 2009 Dynamic Systems and Control Conference, Volume 2, California, USA, p.381-388.

[8]Fiebig, W., 2001. Schwingungs und Gerauschverhalten der Verdrangerpumpen und Hydraulischen Systeme. PhD Thesis, University of Stuttgart, Stuttgart, Germany (in German).

[9]Huang, J.H., Zhao, H., Quan, L., et al., 2014. Development of an asymmetric axial piston pump for displacement-controlled system. Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 228(8):1418-1430.

[10]ISO (International Organization for Standardization), 1996. Hydraulic Fluid Power-Determination of Pressure Ripple Levels Generated in System and Components. Part 1: Precision Method for Pumps, ISO 10767-1:1996. ISO.

[11]Ivantysyn, J., Ivantysynova, M., 2003. Hydrostatic Pumps and Motors: Principles, Design, Performance, Modelling, Analysis, Control and Testing. Akademia Books International, New Dehli, India, p.125-135.

[12]Johansson, A., Andersson, J., Palmberg, J.O., 2001. Effects of cross-angle on piston forces and bending moments in axial piston pumps. The 7th International Symposium on Fluid Control, Measurement and Visualization, Sorrento, Italy, p.1-10.

[13]Johansson, A., Andersson, J., Palmberg, J.O., 2002. Optimal design of the cross-angle for pulsation reduction in variable displacement pumps. Bath Workshop on Power Transmission and Motion Control, Bath, UK, p.319-334.

[14]Johansson, A., Andersson, J., Palmberg, J.O., 2003. Influence from the cross-angle on piston forces and bending moments in variable hydraulic piston pumps. Technical Report No. LiTH-IKP-R-1391, Linköping University, Sweden.

[15]Johansson, A., Ölvander, J., Palmberg, J.O., 2007. Experimental verification of cross-angle for noise reduction in hydraulic piston pumps. Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering, 221(3):321-330.

[16]Landsberger, B., 2003. Using the ideal function concept for machine noise control. The Journal of the Acoustical Society of America, 114(4):2440-2440.

[17]Ma, J.E., Fang, Y.T., Xu, B., et al., 2010. Optimization of cross angle based on the pumping dynamics model. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 11(3):181-190.

[18]Manring, N.D., 2003. Valve-plate design for an axial piston pump operating at low displacements. Journal of Mechanical Design, 125(1):200-205.

[19]Manring, N.D., Mehta, V.S., Raab, F.J., et al., 2007. The shaft torque of a tandem axial-piston pump. Journal of Dynamic Systems, Measurement, and Control, 129(3):367-371.

[20]Mehta, V.S., 2006. Torque Ripple Attenuation for an Axial Piston Swash Plate Type Hydrostatic Pump: Noise Considerations. PhD Thesis, University of Missouri-Columbia, USA.

[21]Nafz, T., Murrenhoff, H., Rudik, R., et al., 2012. Noise reduction of hydraulic systems by axial piston pumps with variable reversing valves. The 8th International Fluid Power Conference, Aachen, Germany, p.1-12.

[22]Seeniraj, G.K., Ivantysynova, M., 2011. A multi-parameter multi-objective approach to reduce pump noise generation. International Journal of Fluid Power, 12(1):7-17.

[23]Xu, B., Zhang, J.H., Yang, H.Y., 2013. Simulation research on distribution method of axial piston pump utilizing pressure equalization mechanism. Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 227(3):459-469.

[24]Xu, B., Sun, Y.H., Zhang, J.H., et al., 2015. A new design method for the transition region of the valve plate for an axial piston pump. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 16(3):229-240.

[25]Ye, S.G., Xu, B., Zhang, J.H., 2014. Investigation into the effects of index angle on fluidborne noise and structureborne noise of a tandem axial piston pump. 8th FPNI PhD Symposium on Fluid Power, Lappeenranta, Finland, p.V001T01A002.